A piece of pumpkin means it will give some 20 medium cubes when cut(1 cup).
Select less tangy tomatoes and I have used Bangalore variety available here.
You can even use small onions instead of big it will be even more tasty.
Adding oil at last to the kulambu is the most needed one in this dish.
The mixed taste of tangyness and spiciness is the specialty of this gravy.
you can even add green chillies during tempering but I have not added.
Keep it as semi gravy as it will be apt to be served with rice.